mass yes, but to think about the disc as a hammer for backhand throwing in that way is incorrect.
for backhand throwing you have to throw it as if the head of the hammer is in the spot where i drew it, while there obviously isn't a hammer head or counterweight there. brad walker and i talked about this quite a bit and have both come to the agreement that the hammerhead out in free space is the correct idea.
or you could think about it as a hammer with an elongated and curved "back end". either way, you would throw it as if the hammer head is where i drew it in.
the hammer head at the opposite edge of the disc is true for sidearm and overhand throwing, but it is not correct for backhand throwing.





